Ignition apparatus.



E. D. BRIGHT.

IGNITION APPARATUS.

APPLIoATIoN Hummm. ze, 1909.

945,262. Patented Jan. 4, 1910.

E. D. BRIGHT.

IGNITION APPARATUS.

v- PPLIUATION FILED MAB. se, 1909.

Umm nro@ l E .ZZ .Bfr/awr a @511752.51 Houding. .A f

Patented Jan. 4,1910.

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E. D. BRIGHT.

IGNITION APPARATUS.

, APPLIOATIGN FILED IAB. 26, 1909. 945,262, Patented Jan. 4, 1910.

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WW1/moco 'UNTTED sTATEs PATENT OFFICE.

EVAND. BRIGHT, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE CONNECTI- CUT TELEPHONE & ELECTRIC COMPANY, INCORPORATED, 0F MERIDEN, CONNECTI- CUT, CORPORATION OF CONNECTICUT.

IGNITION APPARATUS.

Specification of Letters Patent.

Patented an. 4, 1910.

l-To all 'whom 'it may concern: Be it .known that I, EvAN D. BRIGHT, a

citizen of the United States, residing at Philadelphia, county of Philadelphia, Pennsylvania, have invented certain new and useful Improvements in Ignition Apparatus, of which the following is a full, clear, and exact description.

' My invention relates to improved ignition lsystems for engines of the internal combustion variety, the object being yto provide a duplex system of electrical ignition wherety one or the other of said systems may readily employed at any time bythe operation of a switching mechanism, at which mechanism the circuits of the .two systems overlap in such manner as to permit said single means to eifect the desired change.`

Incidentally the construct-ion of the switching mechanism is such that, by the switch blade, either of said systems may be rendered non-operative for ignition purposes. I also may provide separate means whereby theswitching apparatus may be rendered entirely inoperative. In systems-of this kind it is preferable to employ a battery for one system and a high tension magneto for the other system, the sparking apparatusbeing of the jump-spark or high tension variety'.

By the use of this duplex system and duplex switch, the operator of an engine of the `variety referred to may at any instant readily ascertain whether trou le ythat is manifesting itself is due to ignition or to some other cause, and, if due to ignition, he can readily ascertain what system is at fault by simply shifting, withoutV perceptibly stopping the motor, from one syst'em to the other.

`In the accompanyin drawings and in the following descrlption shall proceed to delscribe the invention as employed in a duplex system, in which one set ofA spark'plu s is operated by a lbattery and the 'other y a magneto. 'l

In the drawings Figure 1 is a diagrammatic illustration of my improved system, the mechanical` parts being conventionally illustrated. Fig. 2 is a front view, relativelyl enlar ed, of the cover plate and frame of the switc minus the switch blade pro er, and minus the so-called running plug. ig. 3 is a front view of the switch wlth the running plug and cover plate removed. Fig. 4 is a rear view of the switch. Fig. 5 is a vertical section of the u er part of the switch, taken on the line X of Fig. 4. Fig. 6 is a cross section on substantiall the line Y--Y Fig. 4, looking in thel directlon of the arrow. Fig. 7 is a sidey elevation ofthe running plug. Fig. 8 is a perspective view of a circu1t closer. Fig. 9 is a diagrammaticview of the parts. ofi-the magneto and of the switch showing` the shunt connection between the primary wlnding of said magneto and the swltch. y

E conventionally represents the head'of a four-cylinder engine.

T conventionally represents the timer, of any well known construction and provided with the usual circuit closer (not shown) operated from the engine.

C conventionally represents the casing of a four-unit coil.

M represents a magneto of the high ten-l l sion variety having primary and secondary.

windings m and m respectively, Fig. 9.

S represents the body vof the switch.

B represents a battery.

When the battery circuit is closed, sparking w1ll occur in one set of plugs. When the primary windin of the magneto armature .is interrupted or. roken, sparking will occur 1n another set of plugs.l i

1, 2, 3 and 4 represent spark plugs of the well-known jump-spark type. 1, 2, 3 and 4a represent the secondary or high tension wires leading from the magneto to said plugs respectively. In practicepneend of the primary winding m of the magneto armature is permanently grounded at m2. The other end of this primary winding is indicated at 5.

ying from terminal 46 to the primary winding of the four coil units within the casing C. 10, 11, 12 and 13 represent the ends of the `primary windings of the several coil units in the coil C, which ends 'lead to the segment terminals of the timer T. 14 conventionally represents the ground terminal of thetimer. 15 is a wire leading from the ground terminal 14 to the terminal 19 of the switch. 17 is another switch terminal. 18

is a wire leading from terminal 17 tothe other side of the battery B.

2Q is a switch blade electrically connected with they terminal 19 of the switch. The

lterminals 46 and 17 are located on opposite f 23 is a spring circuit closer operated bythe y end of the'running plug 2 2. The closer 23 is electrically connected with a terminal 24 in any suitable manner upon the body of the switch and said terminal 24 being insulated from all other parts, excepting terminal 16, with which it may be connected in any suit-s able manner, as by a wire' 16".. .25 is a contact post yieldingly mounted on a spring support 25a, said post being about in line with contacts 17-19, or slightly to one side thereof. 26, 27, 28 and 29 are spark plugs designed to be operated from the'coil C throughhigh tension wires 26%, 27, 28a and 29a, respectively. y

30is a rubber gasket or 'packing which bmay be provided for the back of the switch o y. 31 are screw holes through which wood screws may be passed to hold the switch in place upon its mounting.

' Having thus described the main parts of my system and one form of effective wiring, I will now describe the operation.

When the switch blade 20 stands in the middle position on contact 16 (see Fig. 3) no sparking in any of the plugs will occur, because' the battery circuit will be broken -between the terminals 17-19, and because,

the primary winding of the magneto armature will be shunted or short-circuited, as follows: wire 5, terminal 16, blade 20, terminal 19, wire 15, ground 14. This'dead short-circuit prevents any interruption of the primary current generated at the inagneto, and hence no secondary current lis delivered to the spark plugs 1, 2, 3 and 4. When it is desired to operate the system by the battery, switch blade 20 is moved so that it will rest upon the terminal. 17, thus closing the battery circuit, assuming the running plug 22 is in place. Thel battery circuit Will then be as follws: wire 6, terminal 7, wire 33, sleeve 21, plug 22, closer 23,

.terminal 8, wire, 8", term1nal146, wire 9;

thence through the several primary windings of the colls and to the timer through the wires 10, 11, 12 or 13,; thence to ground 14 through the circuit closerglnot shown) of the tlmer, and back through the ground wire l-to terminal 19; thence through blade 20 to terminal 17 and wire 18 to battery. If at any time the plug 22 is pulled, this battery circuit will be broken between the sleeve' 21 and the terminal 8, thus preventing sparking at "the plugs 26, 27, 28 and 29. When the switch blade 20 engages either the terminal 16 or 17, thev primary winding of the magneto will be shunted either directly from terminals16 to 19 through the switch blade 20, or, indirectly through the parts 16, 25, 25 and blade 20, this last mentioned shunt being established when the switch blade is in position to connect the battery with the coils. It follows that so long as" definite intervals and successively, according to the operation of the self-contained timer m3 and interrupting mechanism m4 characteristic of magnetos of this'type, and

which needs no'description herein. lf while the switch blade 20 connects the terminals 46-19, the running `plug 22 is pulled, that act will serve to short-circuit the` primary winding of the magneto as follows: through wire 5 to terminal 16, 4through wire16b to terminal 24, through closer 23 to terminal 8, through ,Wire 8a .to terminal 46, through switch blade 20 to terminal 19, through wire 15 to ground-14. l

From the foregoing it will be seen that this duplex system and switch therefor may be successfully operated for the purposes already described, and two positive means are operative or inoperative at will the two sets `of sparkingplugs `1 to 4 and 26 to 29. The -switch blade 20 is one of such-controlling means. The. plug 22 is a coperating means, the proper displacement of the former or the removal of the latter accomplishing the desired results.

In Athe following claims I shalll use the terms normally open'primary coil circuit. and normally closed magneto shunt circuit, by which I mean that when the switch mechanism is in the neutral position,the primary coil circuit will be openV and the magneto shunt will be closed, thus rendering both ignition systems inoperative.

vWhat-I claim is:

1. vIn a jump-spark ignition system, a normally open primary coll circuit, a normally closed magneto shunt circuit, a switch adapted to said circuits, said circuits overlapping at' said switch, meansfor opening icc provided whereby the operator may render ceive the same, a switch arm andv a running means in said switch for closing the' magneto shunt and for openin the primary coil circuit independently of the `first mentioned means. v

2. In a jump-spark ignition system, a normally open primary coil circuit, avnormally closed magneto shunt circuit, a switch, two separate controlling devices therein, said devices cooperating whereby` said shunt circuit may be closed by either of said devices.

3.111 a switch for a jump-spark'ignition system, overlapping magneto shunt and primary coil circuits, terminals arranged to replug, contacts. adapted toY said plug and i arm `and coperating whereby the removal .of the running plugmay open the coil circuit and close the magneto shunt circuit.

4. In a jump-spark ignition nsystem, a switch, 'terminals therein, a rimary coil circuit and a magneto shunt circuit in contact with said terminals, a runnin plug, a

ma neto, a shunt circuit therefor, a switch, lsai `magneto shunt circuit at said switch, a

switch arm, and means whereby t e shunt circuit 'is maintained at all times exce ting when the'running plug' is in place and switch arm is in a certain osition.

5. In a jumpl'spai'k ignition system, a coil, atimer, a primary circuit for said coil, a

primary coil circuit overlapping the #single means .adapted to .saidl switch for simultaneously closing both circuits or open-k ing both circuitsor opening one and closingthe other of said circuits,'a`nd `a separate cooperating means arranged to close one of the circuits and open the other when the switch arm is in acertain position.

6. An ignition system for gas engines yincluding a coil and timer, a magneto, a spark plug connection for the coil and a spark4 plug connection forthe magneto, a battery circuit for the coil, a shunt circuit for the magneto, a single switching device at which said circuits overlap, twov se arate control- ;V ling members. carried'by sai switching device, one of said members bein removable,

and means coacting -with sai removable coiitrollin .member whereb when the same l is remove .the battery coi circuit will be opened and the magneto shunt circuit will vbe closed.

7. In a jump-spark ignition system, Y a plug, a battery, a timer, an induction coil in operative electrical connection between said battery and plug, a second plug, a magneto the . for said purposes.

" in operative electrical connection with said second plug, the primary circuit of the magneto armature being in electrical connection with the ground of said timer, and a switch includin a blade arranged to make and break said primary magneto circuit and the battery ,circuit leading to the coil, said switch including a second manually operable means for preventing sparking at said plugs irrespective of the position of the switch.l

8. In a duplex jump spark ignition system, a battery and a high tension magneto, a coil and a timer, a switch, a primary circuit leadin from the battery to the coil through sai switch, a'ma neto shunt circuit also leading through sai switch, a switch -blade arranged to simultaneously open one of said circuits and close the other lwhen moved into one position, and means whereby bothI circuits are opened when the blade is in a second position and closed when in a third position, and means manually oper able independentl o ignition indepen entl-y of the position of saidxblade. y

9. An ignition system for gas engines including a, coil and timer, a primary circuit for the `coil, a high tension magneto, a primary circuit therefor, a shunt therefor', a4 switch, the primary coil circuit overlapping the magneto shunt at said switch, two independent controlling means in said switch,

one operating to control the circuits for ig- .nition purposes, the other operating torender the Iirst means inoperative or operative 10. In an ignition system for gas engines including a coil and a timer, a primary coil circuit for the-coil, a magneto, a primary shunt circuit therefor, a switch, the primary coil circuit overlapping the magneto shunt circuit at said switch, two manually controllable means at said switch, one of said means operating to simultaneously close both yof said primary circuits when in one position and to open both primary circuits when in another position and to open one and close the other of said primary circuits when in a third osition, the second means operatin effective or ine ective in twoof its three positions.

EVAN D. BRIGHT.

. Witnesses:

JOHN J. MiNNicx, E. B. McLAnciiLiN.

to ren er the' first means' of the blade to prevent. 

